Veritas Voulme Manager Tips (VXVM)
Calculating Free Space
To calculate the free space, the following can be used:
vxdg free - length shown is free space in 512 byte blocks
To find out the total free space in Kb, the following awk statement could be used:
vxdg free | awk ' $6 ~ /^[0-9]/ { result += $6 } \ END { { answer = ( result * 512) / 1024 } print answer }'
Alternatively use: vxassist maxsize
vxassist maxsize layout=stripe - will give the maximum space available to create a stripe.
Wiping a Volume
To wipe a volume or convert a filesystem to a raw partition, do the following:
1. vxvol stop volume
2. vxmend fix empty volume
3. vxvol init zero volume
Removing a Volume (and plexes and subdisks)
vxedit -r rm volume
Finding VXVM minor numbers
ls -IL /dev/vx/dsk/*dg/* | grep minor
VXVM relayout
vxassist -g dg-name relayout volumename layout=stripe stripeunit=512k ncol=2 alloc=disk1,disk2,etc
VXVM resize
vxresize -b -F vxfs -g dg-name -x volumename newsize e.g. vxresize -g DG -F vxfs volume +25G vxdevicename
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